I am using Canna Nutrients and on the feeding schedule it says a light feeding would be 630it depends on exactly what the 600ppm is coming from. not all ferts are made the same.
^^yeah that's what I was thinking...then again I think that's what I started mine at...I saw a lil burn on the 1st newer leafs but after that they looked pretty good....it depends on exactly what the 600ppm is coming from. not all ferts are made the same.